Blueair - Pure 511i Max
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Reddit Reviews:
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Based on 1 year's data from Mar 19, 2026 How it works
Liked most:
11
1
"I have terrible allergies and use Blue Air on every level. Works amazing."
"happy to hear from guests our house doesn’t have a dog smell."
"Blueair has been awesome for our basement, dogs, cats, sometimes chickens and always a burning fire for the wood stove and you would honestly have no idea all of that was going on. ... I wfh in the basement sometimes and I could tell that without that I was feeling gunky. Buying it made a huge difference!"
19
1
"I have terrible allergies and use Blue Air on every level. Works amazing."
"Super noticeable difference ... even just the fabric pre-filters catch a lot and their appearance varies from room to room (ex. dust in the bedroom, cooking oils in the kitchen) which leads me to believe they’re working!"
"It's amazing the difference it makes. ... Also the filters are a wildly different color when I replace them."
6
0
"Dead silent on the first setting"
"the fans are nice and quiet"
"I like that it has a night mode with a silent fan and no lights."
3
0
"They're incredible and the best thing is that they have this washable cloth sleeve (pre filter) that goes over the entire intake which happens to wrap all the way around. ... It does such a good job that the actual internal filter stays significantly cleaner and doesn't need to be cleaned or changed as often. ... It's a game changer."
"Blueair imo because they have washable prefilters, and pet hair and dander is large and honestly doesn't need HEPA filters to clear it out the way, say, smoke does."
"Blue air. The prefilter is washable."
3
0
"The BlueAir is better and was cheaper."
"BlueAir seemed to have best bang for your buck."
"They are affordable up front"
Disliked most:
3
3
"the auto setting barely did anything unless I literally blew smoke at them"
"Maalikabok pa rin kahit super sealed yung unit."
"I recently got a blueair air purifier to see if I like it and if I notice any difference. ... According to the built-in sensor, we have excellent indoor air quality. ... I've had it for about a month and I recently took the filter out to see if there was any noticeable dust or anything and it seemed pretty clean. ... But given what I've seen so far, I'm not ready to buy them for other rooms in the house since it is quite an investment and I haven't seen anything that makes me think it's effective."
0
1
"I don’t like they have an ionizer that you can’t disable. ... Ionizers create ozone, and when ozone reacts with different molecules it creates all kinds of new compounds that can’t be predicted."
1
2
"Blue air is the best of the three, also isn’t HEPA but has a static generator which bothers some people."
"Although you'll find complaints it doesn't use a "real" HEPA filter"
"Blue air is the best of the three, also isn’t HEPA but has a static generator which bothers some people."
1
2
"the larger sizes have significantly more expensive filters"
"BlueAir is ok but the filters are small and replace more often."
0
1
"Their sensors suck"
"the auto setting barely did anything unless I literally blew smoke at them"
Awodrek 0.3I have cats and use the blueair511i max. It’s in the room with the 2 litter boxes and damn does it make a huge difference. Highly recommend an air filter . Mines automatic . Anytime the cats go in and do the “business” the air filter senses a motion from the litter being smacked around and kicks in .
BonusAdventurous9162 0.3I have a Blueair 511i max for my room which is 11ftlong and about 7ft tall and about 7ft wider does a decent job but I still get back I got for my stuffy nose and the dust which is does quite good at reducing the dust but my nose still feels horrible any suggestions I usually run it on 2-3 speed
Raptor07 0.3We have 2 BlueAir 211i Max for our living room and upstairs and a 511i Max and humidifier for our kids room. I'm in Salt Lake City, UT where we get heavy pollution in the winter inversions and occasional forest fire smoke in the summer. These purifies make easy work of keeping the air clean and work perfectly with HA. They also have a nice look to them so they aren't as much of an eye sore.
Travishamockry 0.3Seconding this. I have two Blueairs too. I have a 511i Max also for my bedroom and the new Signature for the living room. Works well and good stats in HA, which is all I really wanted.
feelmyice 0.0BlueAir Max Pure
Love my blueair - i have 3
motokochan 0.0Blueair works okay. It’s expensive but does work. Coway is definitely more performance for the money though.
I live in Southern California, and the filters are great for fire season to keep the air clean inside. They also help when other things are going on outside like skunks, kicked up dust, the neighbors’ smoky fire pits, or even when it’s a bad pollen day. I’ve tried various brands and I still like the Coway AirMega 200M (same as the AP-1512HH). It’s not the quietest at higher speeds, and it’s not tiny, but it moves the air and filters very well. There’s a reason it’s long been the top pick of Wirecutter. If you want some more style, the various BlueAir models, especially the Pure line are very nice and also work well. They’re a bit expensive though. If money is no object, Austin Air makes some highly regarded machines. In general, UV and ozone are gimmicks. The biggest thing to look at are the CADR ratings. Higher numbers are good, they mean the unit is delivering more filtered air quicker. Always check replacement filter prices, often a good deal on a machine means they make money on selling filters.
MysterySkanker 0.0I have tried and gotten rid of Bluair and levoit- just inadequate performance and louder than I like. I replaced them with Medify and have been very happy with the switch. If memory serves I have an ma-50 in the living room and ma-40 is each bedroom.
9ine6ix5ive 0.0I have BlueAir in all my rooms. Makes a significant difference for me.
Acceptable-Basil4377 0.0It helps a lot. I bought it due to smoke but I’m happy to get rid of cooking and dog smells. I have one from Blueair.
accountaholic26 0.0We love our blueair also. Got a dog a month ago and happy to hear from guests our house doesn’t have a dog smell.